The Cowboys open the season on Sept. 4 against the defending Super Bowl champion Philadelphia Eagles with a need up front if Guyton is unavailable. Who could step up for Dallas in Guyton's absence as the primary protector for Dak Prescott ?

Cowboys left tackle Tyler Guyton was hurt during practice Monday, the second injury on Dallas' offensive line in as many days. According to multiple reports, Guyton has a broken bone in his right knee that will not require surgery and he could miss four to six weeks.